The invasive Pacific oyster is spreading rapidly in Oslofjord, causing injuries to bathers and threatening local ecosystems, with Oslo municipality now offering a reward for their removal.
The changing summer weather has led to a scissor-like boom in Southern Norway. Biologist reassures those who feel threatened.
Large menger glass jellyfish in the Oslo fjord cause problems for both beachgoers and shrimp fishermen. The whole trawl was full before it reached the bottom where the shrimp are.
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